Opera 11 has been released. "Tab stacking is a better way to organize your open tabs. Simply drag one tab on top of another to create a stack. Extensions help you personalize your browser and enhance what Opera can do. With the flick of your wrist, mouse gestures let you navigate back and forwards, open new pages, close tabs and so much more. In Opera 11, you now have a handy visual guide to the wonders of mouse gestures. We changed the address bar, so you can make better sense of the security levels of the sites you visit. Opera 11 now displays a clear badge indicating the security level and allowing immediate, one-click access to security and trust information about the site."

It would be nice that Opera becomes Open Source. This would allow much creative development to occur along with maybe porting to other platforms (e.g. BeOS/Haiku, OS/2/eComStation).

I like exploring other platforms whenever I have some "free" time. However, I find that not being able to use my preferred (and non-main stream applications) limits my enjoyment of these other platforms.

What makes you think that a lot of "creative development" would occur with Opera? After all, an enthusiastic OSS developer wanting to learn about browsers or improve them can already go work on Firefox, Chromium, or any of the countless other OSS browsers already.